| Company | Location | Certifications | License # |
|---|---|---|---|
| Black Diamond Builders | Grass Valley, CA | Installer (C-42) | 831668 |
| Mighty Mike Plumbing Inc | Truckee, CA | Installer (C-42) | 899885 |
| Navo & Sons Inc | Grass Valley, CA | Installer (C-42) | 717036 |
| Navo Jeremey Septic | Grass Valley, CA | Installer (C-42) | 1043568 |
| Pombo Al Inc | Truckee, CA | Installer (C-42) | 382731 |
| Quick Response Septic & Portable Toilet Rentals | Grass Valley, CA | Installer (C-42) | 960628 |
| Talon Construction | Penn Valley, CA | Installer (C-42) | 397350 |
7 companies in the CSLB Licensed C-42 Sanitation System Contractors are based in Nevada County as of 2026-07-23. Companies based elsewhere in California also commonly serve the county.
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